Exhibit 11.1 66 Exhibit 11.1 ------------- ALBEMARLE CORPORATION COMPUTATION OF PRO FORMA EARNINGS PER SHARE for the years ended December 31, 1998 and 1997 (In thousands except per share amounts) Pro Forma Pro Forma 1998 1997 --------- ----------- BASIC EARNINGS PER SHARE Numerator: - --------- Net income after effect of applying SFAS No. 123 "Accounting for Stock Based Compensation" $83,924 $79,394 --------- ---------- Denominator: - ----------- Average number of shares of common stock outstanding 51,558 55,164 --------- ---------- Basic earnings per share $1.63 $1.44 --------- ---------- --------- ---------- DILUTED EARNINGS PER SHARE Numerator: - --------- Net income after effect of applying SFAS No. 123 "Accounting for Stock-Based Compensation" $83,924 $79,394 Denominator: - ----------- Average number of shares of common stock outstanding 51,558 55,164 Shares issuable upon the assumed exercise of outstanding stock options 623 504 --------- ---------- Total shares 52,181 55,668 Diluted earnings per share $1.61 $1.43 --------- ---------- --------- ----------